Paint brush



FIG. 1 is a front elevational view of a paint brush, the rear elevational view being a mirror image of the front view.

FIG. 2 is a left side elevational view thereof.

FIG. 3 is a right side elevational view thereof.

FIG. 4 is a top plan view of the paint brush; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a paint brush, as shown and described. 